Sql Server 删除所有表

如果由于外键约束删除table失败，则先删除所有约束：

--/第1步**********删除所有表的外键约束*************************/

DECLARE c1 cursor for

select 'alter table ['+ object_name(parent_obj) + '] drop constraint ['+name+']; '

from sysobjects

where xtype = 'F'

open c1

declare @c1 varchar(8000)

fetch next from c1 into @c1

while(@@fetch_status=0)

begin

exec(@c1)

fetch next from c1 into @c1

end

close c1

deallocate c1

--/第2步**********删除所有表*************************/

DECLARE c2 cursor for
    select 'drop table ['+name +']; '
    from sysobjects
    where xtype = 'u' and name like '_%'-----------建立数据库时最好加上前缀，删除的时候匹配前缀就可以了 ,匹配下划线可以删除所有表，原因未知
open c2
declare @c2 varchar(8000)
fetch next from c2 into @c2
while(@@fetch_status=0)
    begin
        exec(@c2)
        fetch next from c2 into @c2
    end
close c2
deallocate c2

--删除所有的存储过程同理可得，但不需要走第一步，只需将第2步的代码的where type='U' 改成 where type='P'，drop table 改成 drop Procedure。

如删除数据库izhanshi：

--/第1步**********删除所有表的外键约束*************************/

DECLARE c1 cursor for
select 'alter table ['+ object_name(parent_obj) + '] drop constraint ['+name+']; '
from sysobjects
where xtype = 'F'
open c1
declare @c1 varchar(8000)
fetch next from c1 into @c1
while(@@fetch_status=0)
begin
exec(@c1)
fetch next from c1 into @c1
end
close c1
deallocate c1

--/第2步**********删除所有表*************************/

use izhanshi
GO
declare @sql varchar(8000)
while (select count(*) from sysobjects where type='U')>0
begin
SELECT @sql='drop table ' + name
FROM sysobjects
WHERE (type = 'U')
ORDER BY 'drop table ' + name
exec(@sql) 
end